ZeppelinDev.com helps you make and resize icons for apps for iOS, Android, Windows Phone, Blackberry, Tizen, Web. It resizes and optimizes your app icon designs automatically, and generates icons of all sizes you need before you submit your app to the app stores. It even outputs a valid AppIcon image set, just drop the directory into your Images.xcassets folder, and you're good to go! Also, you can create your own templete for any platform with right size, name, path, etc. We sopport all latest device of iOS, Android, Windows Phone, Blackberry, Tizen, Web. And it just a one click!